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New optical clock is most accurate ever built


Saru

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Scientists have come up with a clock so accurate that it could even redefine the length of a second.

Quote

"We want to improve the timekeeping infrastructure all over the world by building better and better clocks and integrating them into the time-keeping infrastructure," said Dr Christian Grebing.

http://www.unexplained-mysteries.com/news/294898/new-optical-clock-is-most-accurate-ever-built

 

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How do you know when a clock is more accurate than another?

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You compare it to another clock:D

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1 hour ago, Child of Bast said:

How do you know when a clock is more accurate than another?

It's some kind of paradox. Just like this photo of the 'Making of the world's first camera'... how the heck was this photo taken?

making-of-the-worlds-first-camera-thumb.

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38 minutes ago, A_Maine96 said:

You compare it to another clock:D

But who determines which of the two is more accurate?

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40 minutes ago, Child of Bast said:

But who determines which of the two is more accurate?

My original post was an attempt at humor (clearly a failed one), but honestly I don't know. A sundial maybe since time is based on the orbit and rotation of the earth, so I'd guess which ever more closely represents the  time in a day.

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2 hours ago, BiffSplitkins said:

It's some kind of paradox. Just like this photo of the 'Making of the world's first camera'... how the heck was this photo taken?

making-of-the-worlds-first-camera-thumb.

The second, similar camera was built, and used to photograph the first?

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2 hours ago, Child of Bast said:

But who determines which of the two is more accurate?

I think it's done mathematically, by knowing the physics of different devices, maybe?

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I set my clock 15 minutes fast, that way I'm never late.

 
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"Better three hours too soon than a minute too late." - William Shakespeare.
Edited by universal skeptic
error
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33 minutes ago, universal skeptic said:

I set my clock 15 minutes fast, that way I'm never late.

 

Off OP topic..

OK. I will say that my roommate has set her clock 15-min ahead for years and it doesn't work.

She is ALWAYS just leaving the house when she should be at work.

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On ‎5‎/‎26‎/‎2016 at 8:42 AM, Child of Bast said:

How do you know when a clock is more accurate than another?

Get ISO and NIST to control the "standard":rolleyes:

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